package com.example.demo.common;

import org.springframework.util.StringUtils;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

//登录拦截器
public class LoginInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        HttpSession session = request.getSession();
        if(session != null || session.getAttribute(AppValue.SESSION_KEY) != null) {
            //用户已登录
            return true;
        }
        //用户未登录
        response.sendRedirect("/login.html");
        return false;
    }

}
